I'm running Ubuntu 11.10 on Sony Vaio Intel i7 quad core. I have a cpu temp of about 45 deg C. When I used Windows 7, the temp was about 30 deg C. Is 45 normal for Ubuntu?
Edit: More specifically: Intel® Core™ i7 CPU M 640 @ 2.80GHz × 4
You are are not specifying which model of cpu you are running, there are multiple i7 processors. For Sandy Bridge the maximum temperature is 100degrees C., so, you are well inside the parameters. Here you can you can browse some charts.